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Abnormal line bisection judgements in children with Tourette's syndrome
Sheppard, DM, Bradshaw, JL and Mattingley, JB (2002) Abnormal line bisection judgements in children with Tourette's syndrome. Neuropsychologia, 40 3: 253-259.
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| Author(s) |
Sheppard, DM
Bradshaw, JL
Mattingley, JB
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| Title |
Abnormal line bisection judgements in children with Tourette's syndrome
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| Journal name |
Neuropsychologia
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| Publication date |
2002
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| Volume number |
40
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| Issue number |
3
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| ISSN |
0028-3932
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| Start page |
253
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| End page |
259
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| Total pages |
7
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| Place of publication |
Oxford
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| Publisher |
Pergamon-elsevier Science Ltd
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| Abstract |
Tourette's syndrome (TS) has been associated with loss of normal basal ganglia asymmetry, as well as loss of normal functional asymmetry, including the leftward bias on traditional visuospatial tasks such as line bisection and turning bias tests. The aim of the present study was to examine the lateralisation of visuospatial attention in TS. We examined the effect of an irrelevant moving-dot background on line bisection judgements. Nine children with a DSM IV diagnosis of TS participated, in addition to 9 healthy controls, individually matched for age, sex and IQ. Horizontal lines of varying length were presented on a computer screen with either a blank background, or a moving, random-dot field. The dots moved either leftward or rightward across the screen at 40 or 80 mm/s, and participants were instructed to ignore these distracting stimuli when judging the lines. TS children were found to be abnormally right-biased in line bisection in a similar fashion to unmedicated ADHD children who, in a previous study, showed a similar small, yet significant, right-bias in line bisection. Matched controls showed a small, nonsignificant left bias, consistent with past research. Unlike previous findings with hemineglect patients, the irrelevant moving background had no effect on bisection performance for TS children or healthy controls. The present findings suggest a deficit in visuospatial attention consistent with the emerging picture of a lateralised dysfunction of frontostriatal circuitry in TS. (C) 2001 Elsevier Science Ltd. All rights reserved.
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| Keyword(s) |
Behavioral Sciences
Neurosciences
Psychology, Experimental
cormorbidity
laterality
line bisection
Tourette's syndrome
visuospatial attention
Deficit Hyperactivity Disorder
Cerebral Glucose-metabolism
Attention-deficit
Basal Ganglia
Neglect
Performance
Dysfunction
Movement
Mri
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